Periscope.



w. E. KESSLER.

PERISGOPE. APPLlcAloN FILED SEPT. 3o. 1916.

Patented May s, 1917.

A ll .Il .IIIlggfflfgfffllggglllIllill/lill wrrNEssEs @MMA/JIS 74mm ATTORNEY WILLIAM EMIL KESSLER, OF JERSEY CITY, NEW JERSEY.

PERISCOPE.

Specification of Letters Patent.

Patented May 8, 1917.

Application filed September 30, 1916. Serial No. 123,181.

Be it known that I, wWILLIAM E. Knssnnn, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of N ew Jersey, have invented certain new and useful Improvements in Periscopes, of which. the following is a specification.

rlhis invention has relation to periscopes for submarine vessels or the lilre, and the nature and objects thereof will be readily apparent to those skilled in the art to which it appertains in the light of the following explanation of the accompanying drawings illustrating what I now believe to be the preferred embodiment, or mechanical expression, of my invention from among other forms and arrangements within the spirit thereof, or the scope of the appended claims.

However, an object of the invention is to provide a within its support, said lens being movable to a position adjacent the lower end of the periscope so as to be accessible from within the vessel whereby the lens may be cleansed, or replaced by a new lens when an objective has been broken through accident or design.

Another object of the invention is to provide a periscope having the above namedv characteristics, and a new and novel means for producing vertical movement of the objective lens for the purpose above set forth.

In addition to the foregoing, my invenn tion comprehends improvements in the details of construction and arrangement of the correlated parts to be hereinafter more fully described, and particularly set forth in the appended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear:

' Figure 1, is a vertical sectional view taken through a periscope constructed after the manner of my invention,

Fig. 2, is a similar sectional view taken on a plane at right angles to the plane of the foregoing view.

With reference to the drawings, 1 indi- Cates the periscope tube secured at its lower end as at 2 to the roof plate 3 of a submarine vessel, and provided at its upper end with a lateral opening 4, to the rear of which the objective lens is normally seated. Opposed mirrors 5 are located at the upper periscope embodying an objec-l tive lens adapted for vertical movement` and lower ends of the periscope in parallelism, the upper ones being designed to receive the rays from the objective lens and to direct said rays downward toward the second mirror through an intermediate lens G, an eye piece 7 being located at the lower end of the periscope through which to View the reflection in the lower mirror. Thus far, the construction is that of a conventional form of periscope.

F or the purposes of the present invention, the objective lens 8 located normally at the upper end of the periscope is mounted in a casing 9 or block, formed with a vertical groove 10 at eitherI side, for the purpose of receiving the edges of vertical guide strips 11 extending from top to bottom of the periscope within the tube 1, and secured at their upper ends as indicated at 12 by suitable fastenings, and at their lower ends as indicated at 13 to framing within the submarine vessel. The strips 11 are disposed at opposite sides of the periscope tube and therewithin, to guide the casing 9 containing the objective lens for vertical movement, and it will be obvious that owing to this arrangement the objective lens is capable of movement from an uppermost position within the opening 4, to an extreme lowermost position, permitting access to the lens from within the submarine vessel.

One ofthe guide strips 11 is spaced from the inner side of the periscope 2, and a vertically extending threaded shaft 14 is interposed therebetween journaled in bearings 15 at its upper end, and 16 at its lower end, thereby permitting rotation of said shaft. lThe casing 9 of the objective lens is provided at one side adjacent the threaded shaft with an extension 17, provided with a vertically extending internally threaded opening designed to receive in threaded engagement the shaft 14. A casting 18 is secured to the inner side of the roof of the submarine vessel for the purpose of forming a support for the bearing 16, and for a transversely extending shaft 19. A gear wheel 20 is mounted upon the shaft 19 and is formed with inclined teeth designed for meshing engagement with the threaded portion 21 at the lower end of the threaded shaft 14, the gear wheel 20 being provided with a handle permitting manipulation thereof.

It will be obvious, that upon rotation of the gear wheel 20, its movement is communicated to the threaded shaft 14, and

owing to its present engagement with the objective lens casing 9, said lens casing and consequently the lens inclosed therein is moved, within the periscope tube in a vertical direction, either up or down, depending upon the direction of rotation of gear wheel 20. The objective lens and its casing are normally disposed at the upper end of the guide strip ll thereby disposing the lens to the rear of the opening 4t. When, however, the lens is pierced through accident or by design, or the lens is purposely blurred by the enemy when the craft is used in an engagement by casting oil upon the surface of the water, the lens and its casing may be quickly moved to the lower end of the periscope, soV

as to permit cleaning of the lens, or re'- placement thereof by an unbroken lens, whereupon the lens in the objective may be then quickly moved to the upper end of the periscope tube in place.

WhileV I have illustrated and described my invention with some degree of particularity I realize that in practice various alterations thereover may be made, and I therefore reserve the right and privilege of changing, the form of the Vdetails of construction, or otherwise altering the arrangement of the correlated parts without departing from the spirit of the invention or the scope of the appended claims. j

Having thus described my invention what I claim as-new and desire to secure by .Letters Patent is l. In a periscope, a tube, an objective lens movable longitudinally within the periscope tube from its normal position .to aposition permitting access'thereto for cleaning or repair, and means for causing such movement.

2. In a periscope, a tube', an objective lens movable longitudinally within the periscope tube from its normal position toa position permitting access thereto for cleaning or repair, and means for causing said movement,

fopies o! this'patent may oe obtained for tive centseaehyby addressing the Washington, D. C.

said means automatically retaining said lens in its adjusted position.

3. In a periscope, a tube, an objective lens therewithin, means for moving the lens longitudinally within the periscope tube from its Vnormal position therewithin to av position permitting access to the lens for cleaningor repair and means for guiding the lens during such movement.

1l. In a-periscope, a tube, an objective lens adapted for movement longitudinally within the periscope tube, means for guiding the lens in such movement, and means for moving the le'ns along its guide, said moving means acting automatically to retain the said lens in adjusted position.

5. In' a per1scope,rguideways extending longitudinally within theV tube, an objective lens, ka casing for said lens' mounted for movement between the guides, and means for moving said lens casing and lens from its normal position, to a position permitting access thereto for cleaning or repair.

6. In a periscope, a tube, guide-ways extending longitudinally within the periscope tube, a casing movable between the guides, an objective lens mounted within the casing, a lateral extension onsaid casing having a threaded aperture,"a threaded shaftV extending longitudinally wi hin the periscope'tube and within the threaded opening and gearing for rotating said shaft therebycausingl longitudinal movement of the casing .and

lens Within itsV guide from-the normal posi-L Y tion of the lens and casing to a position permitting access thereto for cleaning orV repair.

In testimony whereof I afliX my signature in presence of two witnesses.

WILLIAM EMIL-ImssLIfin.

Witnesses: Y Y Y WILLIAM H. ROPKIIR, A. H. KEssLER.V

Commissioner of Patents, i 

